Dangerous to ask after you've ordered
The WO SWAN's, as with other cheaper widefields, provide nice performance in slow scopes but are challenged at the edge of field in fast scopes. I've got a pair of 20mm SWAN's for binoviewer use and they work well with the f/10 light cone.
The Celestron Omni's I think are a basic plossl - they'll give decent on axis performance though the price ($85) is similar to the Televue plossls on special at Bintel. Shorter focal length plossls have very short eye relief - it might be preferable to use a quality barlow with a longer focal length plossl.